1. Region of Interest Ku-Yaw Chang canseco@mail.dyu.edu.tw Assistant Professor, Department of Computer Science and Information Engineering Da-Yeh University

2. 22004/04/21Medical Imaging System ROI ROI Region of Interest Region of InterestRectangleEllipsePolygonVOI Volume of Interest Volume of Interest

3. 32004/04/21Medical Imaging System Mouse Events WM_LBUTTONDOWN OnLButtonDown(UINT nFlags, CPoint point) OnLButtonDown(UINT nFlags, CPoint point)WM_LBUTTONUP OnLButtonUp(UINT nFlags, CPoint point) OnLButtonUp(UINT nFlags, CPoint point)WM_LBUTTONDBLCLK OnLButtonDblClk(UINT nFlags, CPoint point) OnLButtonDblClk(UINT nFlags, CPoint point)

4. 42004/04/21Medical Imaging System Parameters nFlags Indicates whether various virtual keys are down. This parameter can be any combination of the following values: Indicates whether various virtual keys are down. This parameter can be any combination of the following values: MK_CONTROL Set if the CTRL key is down. MK_LBUTTON Set if the left mouse button is down. MK_MBUTTON Set if the middle mouse button is down. MK_RBUTTON Set if the right mouse button is down. MK_SHIFT Set if the SHIFT key is down. point Specifies the x- and y-coordinate of the cursor. Specifies the x- and y-coordinate of the cursor. These coordinates are always relative to the upper- left corner of the window. These coordinates are always relative to the upper- left corner of the window.

5. 52004/04/21Medical Imaging System CRect Basic data members left left Specifies the x-coordinate of the upper-left corner of a rectangle. top top Specifies the y-coordinate of the upper-left corner of a rectangle. right right Specifies the x-coordinate of the lower-right corner of a rectangle. bottom bottom Specifies the y-coordinate of the lower-right corner of a rectangle.

6. 62004/04/21Medical Imaging System ROI Recorded as a rectangle CRect CRect OnLButtonDown OnLButtonDown CRect::left, CRect::top CRect::left, CRect::top OnLButtonUp OnLButtonUp CRect::right, CRect::bottom CRect::right, CRect::bottom

7. 72004/04/21Medical Imaging System CRect::NormalizeRect Example CRect rect1(110, 100, 250, 310); CRect rect2(250, 310, 110, 100); rect1.NormalizeRect(); rect2.NormalizeRect(); // rect1 should be unchanged // rect2 becomes (110, 100, 250, 310)

8. 82004/04/21Medical Imaging System Draw an ROI CPen while while solid solidCBrush

9. 92004/04/21Medical Imaging System CPen CPen( int nPenStyle, int nWidth, COLORREF crColor ); nPenStyle Specifies the pen style. Specifies the pen style. PS_SOLID Creates a solid pen. PS_DASH Creates a dashed pen. PS_DOT Creates a dotted pen. PS_NULL Creates a null pen. nWidth Specifies the width of the pen. Specifies the width of the pen.crColor Contains an RGB color for the pen. Contains an RGB color for the pen.

10. 102004/04/21Medical Imaging System SelectObject Pen APen B Pen A Pen B (1) (2) (3)

11. 112004/04/21Medical Imaging System Draw an ROI CRect rc(100,100, 200, 200); COLORREF crPen; crPen = RGB(255, 0, 0); CPen penRed(PS_SOLID, 1, crPen); CPen * pOldPen; pOldPen = pDC->SelectObject(&penRed); pDC->SelectStockObject(HOLLOW_BRUSH);pDC->Rectangle(&rc);pDC->SelectObject(pOldPen);

12. 122004/04/21Medical Imaging System ROIs Use list to store more than one CRect Standard Template Library (STL) List List Stack Stack Queue Queue Vector Vector …

13. 132004/04/21Medical Imaging System list Include #include #include using namespace std; using namespace std;Declaration list listROI; list listROI;Add push_back, push_front push_back, push_frontRemove pop_back, pop_front pop_back, pop_front

14. 142004/04/21Medical Imaging System list Iterate list ::iterator i; list ::iterator i; for (i = listPoint.begin(); i != listPoint.end(); ++i) for (i = listPoint.begin(); i != listPoint.end(); ++i)Miscel size() size() clear() clear() front() front() back() back()